Printing-press-bed movement



1,567,152 W.' M. KELLY PRINTIN'S PRESS BED MOVEMENT Filed April 23, 1921 5 Sheets-Sheet l Dec. 29 1925- w. M. KELLY PRINTlNG PRESS BED MOVEMENT Filed April 23. 1921 5 Sheets-Sheet 2 s 'Il We@ Y ,M1/d?, .3.51 I K/fun/ mi Dec. 29,1925.- 1,567,152

W. M. KELLY PRINTING RESS BED MOVEMENT Filed April 23, 1921 5 sheets-sheet s /////////////////lll/[22@ lllllllllll L IIIIIIIIIIIIIIIII Illlllllllllllllllllllllllllllllillllllll g x l l I I w. M. KELLY PRINTING PRESS BED MOVEMENT Dee. 29, 1925. 1,567,152

Filed April 23, 1921 5 Sheets-Sheet 4 pee. 29, 1925.

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Patented Dec. 29, 1925.

WILLIAIVC MI.y KELLY, OFJERSEY CITY, NEVI JERSEY.

PRNT-NG-PRESS-BED MOVEMENT.

Application filed April 23, 1921.

lmentsV and more particularly to a mechanism for reciprocating; the bed of a printing press.

The salient objects of the invention are to provide a simple and positive means for rc- Y ciprocating' the bed of the press at` auniform velocity .during the greater portion of its stroke and to give an easy and smooth reversal at the end portions of the `reciprocation. For these purposes the mechanism comprises in combination with the reciproeating member a second reciprocating member driven in` timed relation with the first member. to make a plurality offreciprocations while the first member makes a single reciprocation and means for connecting the two members when the second member is making'` one of its reversals whereby the irsi member is quickly reversed. Other objects and features of the invention will be apparent from the description taken in connection with the drawings, in which,

Figi'. ly is a side elevation of a portion of a printing press having; the structure of the invention embodied therein;

2 is` a sectional Velevation taken substantially on the line 2 2 of Figure 3;

Fig, 3 is a sectional view in plan, showing'the parts illustrated in Figures land 2;

Figs. 4 to 9 inclusive are diagrammatic .'iews showing the relative positions of the parts when the bed is being reversed. In these views the ('l-.rivinpl gears have been shown as separated laterally in order to clearly illustrate their relative angular positions.

In the embodiment of the invention illustrated in the drawings, the reciprocating member or bed is mounted to slide on four parallel roller bearings 11, which in turn are supported by the frame l2 of the press. Centrally located on the bottom of Serial No. 463,932.

the bed and extending,` lengthwise thereof are two spaced racks 13 and 14, through which the bed is adapted to be driven at a uniform velocity first in one direction and then in an opposite direction. For this purpose ay shaft 15 is mounted in the frame and is adapted to be driven by a pulley 16, or any other desired means. Secured to rotate with this shaft is a pinion 17, which meshes with a large spur gear 18, loosely mounted on the shaft 19. Compounded with this gear 18, or secured to rotate in unison therewith is e wheel 20, which is arranged in the plane of the rack 14, and has a portion of its periphery provided with gear teeth 21, and the remaining portion being' blank as shown at 22. As clearly illustrated in the diugrammatic views. the teeth 21 extend around a portion of the circumference which subtends an angle ofapproximately 120. nterposed between the wheel and the rack 14 is a pinion 23, which is secured to a short shaft 24 mounted in bearings 25 and 26, car ried by the frame. As the wheel 20 rotates the teeth 21 thereon will mesh with the teeth on the gear 23 and thus through the rack 14 drive the hed 10 at a uniform velocity in one direction. The bed is driven in the opposite direction by a similar mechanism which will now be described. The shaft 15 extends lat erally outside of the frame and carries a gear 27, which meshes with an easy gear 28 secured to the shaft 29, also mounted in bearings on the frame. Attached to this shaft 29 to rotate therewith is a pinion 30 of the same size as the pinion 17, and which meshes with a `gear wheel 31 of the same size as the tgear wheel 18. ompounded with this ,f jear '31, or adapted to rotate in unison therewith. is a wheel which is similar to the wheel 20, and is formed with teeth 33, which cxtend around a portion of the circumference of the wheel, the remaining' portion of the periphery beingI smooth or blank. iis in the wheel 20, the teeth 33 subtend an angle of approximately 129. Arranged in the plano of the wheel 32 and the rack 13 is a pinion 34, which is the same size as the pinion 23, and is also secured to the short shaft 24. As the wheel 32 rotates, the teeth 33 thereof will mesh with the teeth on the pinion 34, and thus drive the bed or reciprocating mem ber. However, as the wheel 32 is rotated in au opposite direction relative to the wheel 20, the bed, when driven by the wheel 32. will be moved in a direction opposite to that which it is driven when actuated by the wheel 20.

For the purpose ot' reversing the bed or reciprocating member at the ends of its stroke, a` second reciprocating member is provided which is adapted to be periodically connected with the lirst reciprocating inemv bei' when the former is making a reversal. As shown in the drawings, this second reciprocating member may comprise a vertically arranged plate 35, which is located in the space between the wheels 2O and 32. The plate mounted for its reciprocating movement on two blocks 36 and which are cai'- 'ried by the frame and toi-ined with guidewivs and 39, respectively, the plate having slots 49 and 4l, in which the blocks 3-3 and 37 are iitted. Adjacent the ends; voi? the upper edge of the plate 35 are 'the short racks and 43, which at the propertiiiies are adapted to bc alternately connected with the bed of the press so that the two reciprocating members connected t'or movementin unison. The rack 42 is carried by an arm 44, which is pivoted at 45, and has a laterally extending pin 46, which works in a cam groove 4T formed in the cam block 48 carried by the frame of the press. In a similar manner the rack 43 is carried by an arm 49 pivoted at 59, and has a laterally extending pin 5l, which works in a cam groove 52, formed iii the cam block 53 carried by the frame of the press. Located between the racks 13 and 14 on the bottom of the bed are two rack blocks 54 and 55, the block 54 being positioned so that at the proper time it may be engaged by the rack 42 and the 'ack block 55 being positioned so that it may be engaged by the rack 43 when the press is being reversed at the right end of its stroke, as viewed in Figure l.

For the purpose of reciprocating the plate 35, a shaft 5G is mounted in bea-rings in the t' rame and is rotated from the gear 27 by.

'means oi the gears and 53, the latter gear being secured to the shaft 56 and being as shown in the drawings, of the saine diameter the gears and 34 and oi oiie-tliird the diameter of gears 18 and 20. Adjacent the plate 35, the shaft 55 has attached thereto a crank arm 59, which at its outer end carries a block 60, which is slidingly itted in the groove (il formed in the plate. Thus as the sha't't 5G rotatesa simple harmonic reciprocation will be given to the plate 35 through the crank and block connection. The axis o' the block 60 which is pivoted to the crank arm describes a circle, the diaineter ot which is the saine as the diameter ot the pitch circles of the gears 58, 23 and 34. Because ot these dimensions of the parts, it will be observed that when the crank 59 is in either its upper or lower vertical position oi the plate 35 and ot' thi" bed l0, will be the saine. Hence, if these two reciprocating members are connected together at these particular positions of the rotating crank 59, there will be no binding or straining of the parts.

In order to clearly describe the timing of the mechanism, reference will now be made to the diagrammatic views 4 to 9 inclusive. In Figure l, the bed or reciprocating ineinber is shown substantially in its central position. In the diagrammatic view of Figure 4, the bed is shown approaching the right hand end of its stroke. In this ligure and the other diagrammatic views it will be noted that the gears 2O and 23 have been shown as oli'sct laterally with respect to the gears 32 and 34, this being necessary in order to show the relative positions of the toothed portions ot the wheels 2() and 32. In Figure 4, the toothed portion of the wheel 2() has been driving the bed l0 in the direction indicated by the arrow, but it will be observed that the end of the toothed portion 21 will soon go out ot mesh with the geail 23 and that this wheel 2O will therefore continue to drive the bed during a very small angle of its rotation. An inspection of the position of the crank 59 snows that it is a very slight angle in advance of vits upper vertical position. Consequently,-the velocity ot the reciprocating plate is approximately the same as that of the bed 10. Hence, it is possible to connect the two reciprocating members at this instant and for the small remaining driving angle of the wheel 20, the driving means of both the bed and plate will be effective. The cain block 53 is therefore located on the iframe, and its groove 52 so formed that the rack 43 will be projected upwardly to engage the cooperating rack block. 55 on the bottom of the bed when the crank 59 and wheel 20 are in the positions illustrated in this Figure 4.

The parts of the mechanism will continue to rotate in the directions indicated by the arrows, and an instant later will be in the v'positions illustrated in Figure 5. It will be observed that the blank portion ot the wheel 20 is now opposite the pinion 23, and conscquently that` the bed is no longer driven by means ot the wheel 20, the crank 59 having taken up this function. Thus as the plate 35 Iis retarded to Zero velocity, the bed l0 will also be retarded, the positions of the parts when the two reciprocating members l0 and 35are at the point of reversal and zero velocity being shown in Figure 6. From the positions illustrated in this ligure, the parts move to positions shown in Figure 7. The toothed portion of the wheel 32 is justcoining into mesh with the pinion 34 andthe crank 59 is a slight angle in advance ot' its lower vertical position. Thus the velocity imparted to the two reciprocating members by their respective driving means are substanti ally theE same, andhence the kdriv in ,oft the bedgmay.betransferred fromithe crank 59 .to thegear lWhile thecra-nk is. moving 'from the position shown in llligure 7 to `that shoivnin `lligure 8, bothottlieidriving,means are acting, thecam groove causing the rack 43 to be entirely, disengaged yfrom the. hed when the crank is in the position shovnr in Eig-ure S. The toothedportion of the Wheel ivill now operateto drivethe bed atta uniiorm velocity for approximately one rota tion of the pinion 34. During this time as the pinion 3i and crank rotate at` the same angular velocity, the crank 59 will also have made. substantially one revolution. The positions ot the parts at the time when the pinion 2li and the crank 5%) have iliade substantially one revolution, are ilinstraed in Figure 9. As the velocities o'if the tn'o reciprocatingmembers 851 and 10 are substantially.V the same, the plate 35 may hc connected tothe bed at `this instant, andthecain groove 4f? is formed so that the rack @i2 `will be actuated into engagement with. the cooperating rack block 5i on the bottom. of" the bed 10. The operation ot the reversing means att-his end of thestroke oi the bed is similarto vthat at the other and requires `no further. description.

It. is thus apparent l that this invention comprises means for moving a reciprocating member at av uniform velocityY iirst in one i direction and then inthe opposite direction,

and a re Yersing means forl the said reciprocating member, which consists of asecond reciprocating member which makesias plurality of reciprocations ior` each" reciprocationofthe rst member. vWith the proportions. ofthe parts` asil described above, the plateA 35 or secondv reciproca,tingI member makes three complete reciprocations, While the bed or rstreciprocating member lmakes one complete reciprocation. Thus iiive designatelthe radius or' the crank pin circle as the bedivill move at a uniform velocity a .distance of 2r, this being the circumference oi the pitch circ-le of the pinion 5S, then while the velocity of the bed is being. retarded to zero, itivill move through a distance equal to r. Likewise, when` the velocityoi the bed is being. accelerated from Zero, it will move through a distance r. Thus the distance that the bed; moves through in. travelling from oneA endy ofl its stroke to the other may be represented by 9171+271 Thus when thesecond reciprocating member makes three complete reciprocations for one reciprocation of the bed or first reciprocating member, the bed will have a uniform velocity for about 75% of its travel,

and with the reversing mechanism above described, will be successively retarded and accelerated with a harmonic motion at the ends of its stroke.

The invention has been shown in a press of the .tivo-revolution type. The impression cylinder v62 may be driven by agear (39 which meshes with theigear 5T. Furthermore, the bedi ma)v be provided with a cnshionii j means 64 ot any desired type which is for thepnrposc ot' aiding inthe retardiu;f oil the momentum ot' the bed at the onde: oi its` stroke.

it, Will be observed that thearrangrennmt ol? the bed drivingnneans is such that there isno twist or side thrust given to the bed. The pinions 25:3 and Sel are secured to the same shaft, and are located symmetrically relatively to the center line ot' the lied. Hence, whether pinion Q3 or is driven, both gears will act on the racks iland thereby centralizinov the drivingy Vtorre.

Althoughaspecilic embodiment o l the invention has been described and illustrated, it` is apparent that4 thc details thereof maj.' be varied consideralily Without departure from the spirit oil theinvcntion.

Having thus described the invent ion what is claimedas new and desired to bc. secured by Letters Patent is:

l. The combination With a l'eciprocati member and means 'tor reciprocating the saine including` ttvoracks on said member` a pair of oppositely rotating` gears each havw ing` teeth on a portion only of its periphe a pinion interposed between each gear and one .of theiracks and constantly in mesh with said3 rack, the toothed portion ol? the gears beingarranged so that the member is driven alternately in opposite directions, ol a ri vcrsinn mechanism including a second niemberwhich is reciprocated parallel to the first. reciprocating member, and movable racks constituting means for directly con fleeting the tvvo members While the second member is reversing.

2. In combination a Jframe having' parallel` Ways, a member slidinoly nionntcd on said Ways, and gui-ding or drive mechanism for reciprocatingI said member Without any twist or side thrust including a rack on each side o't the longitudinal centre line ol the member, said racks beingl spaced equally iroin said centre line., a pinion engraeinig eachrack,a.pairoioppositely rotatingl o each having' teeth on a portion only of its periphery and constituting,l means 4for periodically driving said pinions with equal circumferential velocities first in one direction and then in the other, a second member which is reciprocated parallel to the first reciprocating member and has a shorter stroke than the iirst member, and devices comprising movable racks ior connecting said second member to the first member alongI the centre line of the latter alternately at each end of the same to reverse the movement of said first member.

3. The combination with a. reciprocatingmember and means for reciprocating, the

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same including a pinion constantly in mesh with a rack on said member andy adapted to drive the same in one direction, a second pinion constantly in mesh with a second rack on said member and adapted to drive the same in the opposite direction, and a pair of oppositely rotating gears each having teeth on a portion only of its periphery and constituting means for alternately connecting said pinions with a source of power, of a. reversing mechanism including a second member which is reciprocated parallel to the lirst reciprocating member, one of said members having racks adapted to be moved into engagement with the other member to connect them for movement together when the second member is reversing, and mea-ns for automatically operating the movable racks so as to connect the two members substantially when one pinion is disconnected from the source of power and to disconnect the two members substantially when the other pinion is connected with the source of power.

4. The combination with a reciprocating member and means for reciprocating the same including a pair of parallel'racks on said member, a shaft having two pinions secured thereto, each pinion being constantly in mesh with one of the racks, two oppositely rotating gears each having teeth on a portion only of its periphery adapted to drive one of the pinions, the said toothed porti-ons of the gears being arranged so that the member is periodically driven alternately in o-pposite directions, of a reversing mechanism including a second member which vis reciprocated parallel to the first reciproeating member, a second shaft having a crank operative to reciprocate said second member, the radius of the crank being the same as the radius of said pinions, means for driving said crank at the same angular velocity as said pinions and means for connecting the two members along the centre line of the lirst member during a reversal of the second member.

5. The combination with a reciprocating member and means for reciprocating the same including a gear constantly in mesh with said member and means for periodically connecting` said gear with a source of power, of a reversing mechanism including a second reciprocating member moving in a path parallel to that of the first reciprocating member, one of said members having means adapted to be moved relative thereto adapted to drive the same in the opposite.

direction, and means for alternately connecting said gears with a source of power, of a reversing mechanism including a second reciprocating member moving in a path parallel to that of the first reciprocating member, one of said members having means adapted to be moved relative `thereto into engagement with the other member' to connect them for movement together when the second member is reversing, and stationary cams for automatically operating said last mentioned means to move the latter to connect the two members substantially when one gear is disconnected from the'source of power and to disconnect the two members substantially when the other gear is connected with the source of power.

7. The combination with a reciprocating member and means for reciprocating the same including two coaxial gears constantly rotating in opposite directions at a uniform angular velocity, and means for alternately connecting said gears with said member to move the latter first in one direction and then in the opposite direction at a uniform velocity, of a reversing mechanism including a second reciprocating member, one of said members having means adapted to be moved into engagement with the otherrmember to connect them for movement tog-ether when the second member is reversing, and means for automatically operating said last mentionedimeans to move the latter, to connect the two members substantially when one gear is disconnected from the first member and to disconnect the two members substantially when the other gear is connected with the said first member.

In testimony whereof1 l hereunto affix my signature.

VVILLAM M. KELLY. 

